<template>
 <!-- Root element of PhotoSwipe. Must have class pswp. -->
<div class="pswp" tabindex="-1" role="dialog" aria-hidden="true">

    <!-- Background of PhotoSwipe.
         It's a separate element as animating opacity is faster than rgba(). -->
    <div class="pswp__bg"></div>

    <!-- Slides wrapper with overflow:hidden. -->
    <div class="pswp__scroll-wrap">

        <!-- Container that holds slides.
            PhotoSwipe keeps only 3 of them in the DOM to save memory.
            Don't modify these 3 pswp__item elements, data is added later on. -->
        <div class="pswp__container">
            <div class="pswp__item"></div>
            <div class="pswp__item"></div>
            <div class="pswp__item"></div>
        </div>

        <!-- Default (PhotoSwipeUI_Default) interface on top of sliding area. Can be changed. -->
        <div class="pswp__ui pswp__ui--hidden">

            <div class="pswp__top-bar">

                <!--  Controls are self-explanatory. Order can be changed. -->

                <div class="pswp__counter"></div>

                <button class="pswp__button pswp__button--close" title="Close (Esc)"></button>

                <button class="pswp__button pswp__button--share" title="Share"></button>

                <button class="pswp__button pswp__button--fs" title="Toggle fullscreen"></button>

                <button class="pswp__button pswp__button--zoom" title="Zoom in/out"></button>

                <!-- Preloader demo https://codepen.io/dimsemenov/pen/yyBWoR -->
                <!-- element will get class pswp__preloader--active when preloader is running -->
                <div class="pswp__preloader">
                    <div class="pswp__preloader__icn">
                      <div class="pswp__preloader__cut">
                        <div class="pswp__preloader__donut"></div>
                      </div>
                    </div>
                </div>
            </div>

            <div class="pswp__share-modal pswp__share-modal--hidden pswp__single-tap">
                <div class="pswp__share-tooltip"></div>
            </div>

            <button class="pswp__button pswp__button--arrow--left" title="Previous (arrow left)">
            </button>

            <button class="pswp__button pswp__button--arrow--right" title="Next (arrow right)">
            </button>

            <div class="pswp__caption">
                <div class="pswp__caption__center"></div>
            </div>

        </div>

    </div>

</div>
</template>

<script>
import PhotoSwipe from 'photoswipe'
import PhotoSwipeUI_Default from 'photoswipe/dist/photoswipe-ui-default'
export default {
  name: 'PictuerView',
  props: {
    imgs: {
      type: Array,
      default() {
        return []
      }
    },
    index: {
      type: Number,
      default: 0
    }
  },
  data () {
    return {
      gallery: null
    }
  },
  created() {
    // this.initGallery()
  },
  mounted() {
    console.log(this.imgs)
  },
  updated() {
    console.log(this.imgs)
  },
  methods: {
    currentImg(index) {
      let gallery = this.initGallery()
      gallery.goTo(index)
    },
    initGallery(index) {
      this.$nextTick(() => {
        let pswpElement = document.querySelectorAll('.pswp')[0]
        let options = {
          showHideOpacity: true,
          bgOpacity: .7,
          closeOnScroll: false,
          history: false,
          loop: false
        }
        const gallery = new PhotoSwipe(pswpElement, PhotoSwipeUI_Default, this.imgs, options)
        gallery.init()
        console.log(gallery.currItem)
        if (index > 0) {
          gallery.goTo(index)
        }
        gallery.listen('close', () => {
          this.$emit('close')
        })

      })
    }
  }
}
</script>

<style lang="stylus">
@import '~photoswipe/dist/photoswipe.css'
@import '~photoswipe/dist/default-skin/default-skin.css'

.pswp
  z-index 9999
</style>
